Multicylinder internal combustion engine



Nov. 5, 1935. A. P. BRUSH 2,019,558

MULTICYLINDER INTERNAL COMBUSTION ENGINE Filed May 12, 1950 5Sheets-Sheet 1 INVENTOR ATTORNEYS 3 SheetsSheet 2 INVENTOR ATTORNEYSNov. 5, 1935. A. P. BRUSH MULTICYLINDER INTERNAL COMBUSTION ENGINE FiledMay 12, 1950 Nov. 5, 1935. A. P. BRUSH MULTICYLINDER INTERNAL COMBUSTIONENGINE I Filed May 12, 1930 5 Sheets-Sheet 3 ATTORN EYS Patented Nov. 5,1935 UNITED STATES PA'TE'NTOFFICE Alanson 1. Brush, Detroit, Mich.

Application May 12, 1930, Serial No. 451,756

8 Claims.

The invention relates to multi-cylinder internal combustion engines ofthe V-type and has more particular reference to a construction adaptedfor the economical manufacture of engines having a relatively largenumber of cylinders such as twelves and sixteens. It is the primaryobject of the invention to simplify the construction so as to facilitatework both in the foundry and in the machine shop. To this end theinvention consists in the construction as hereinafter set forth.

In the drawings:

Figure 1 isa vertical cross section through an engine of my improvedconstruction;

Figure 2 is an elevation of one of the sections with the complementarysections removed.

Figures 3 and 4 are enlarged sections through the crank shaft bearingsupports and split bearings showing the manner of assembling the same.

In general construction my improved engine is of a V-type in which theincluded angle between cylinder axis is relatively small, such forinstance as thirty degrees. To permit of this the valves and, operatingmechanism are arranged on the outer sides of the cylinder blocks whichlatter are of the L-type. Each of the V-blocks forms a completelyoperative unit which may be run and tested independent of thecomplementary block, thereby facilitating proper tuning.

To simplify manufacture, the blocks are formed of separate castings,each including a bank of cylinders and one-half of the crank casetogether with half bearing supports for the engine crank shaft. By thusopening into the crank case, foundry work is simplified and as each ofthe sections can be independently finished, machining operations arecorrespondingly simplified.

In detail, A and A are the two blocks, each having a, bank of cylindersB with an L-head C. The water jacket D surrounds the cylinders andL-head and extends inward to the meeting plane of the blocks. Lugs E maybe arranged at suitable intervals extending upward from the water jacketand forming a means for securing the two blocks to each other by screwsor bolts F. Each block has also formed integral therewith onehalfsection G of the crank case. At suitable points in the length of theblock are transversely extending division Walls H which form supportingwebs for apertured lugs I constituting cam shaft bearing supports andthe half bearing supports J for the crank shaft bearings. The halfbearing supports J are secured to each other by bolts K extendingtransversely through one of the crank case sections and engaging athreaded socket in the complementary section as shown in Figure 1.

Each of the blocks is provided with a detachable head L and an oil pan Mis secured to the bottom of the crank case sections. The valves 5 N havetheir stems extending parallel to the cylinder axes and tappets O areslidably mounted in bearings P projecting from the cylinder bank so asto be arranged in operative relation to the cam shaft of the bearings I.The engine crank 10 shaft Q is of conventional construction journalledin bearings engaging the half bearing supports J. These half bearingssupports J are accurately aligned by placing therein half bearingbushings R having a horizontal plane of division 15 or perpendicular tothe plane of division of the half bearing supports J. The externaldiameter of the bushing is slightly greater than the internal diameterof the half bearings for receiving the same so that when the bolts K aretightened go the bushings will be firmly clamped and held fromdisplacement.

With the construction as described, the two block sections A and A areseparately machined and are then assembled about the crank shaft as 25illustrated in Figures 3 and 4, the bushing sections R being firstplaced in engagement with the corresponding journals on the crank shaftand the half bearings J being then drawn together about the bushings bythe bolts K. Dowels 30 S set in one of the half bearings J and engagingcorresponding apertures in the bushing sections hold the latter in exactregistration. The two block sections are held in longitudinalregistration either by an end plate T as indicated in Fig- 35 ure 2 orby a key U engaging slots U in the meeting faces of the sections. Thusthe transverse arrangement of the splits in the crank shaft bearings andbearing supports will hold the two block sections with the axis of thebearings coincident with the axis of the crank shaft, while the endplate or key insures exact registration longitudinally,

What I claim as my invention is: 4:5

1. A multi-cylinder V-type engine comprising two separate sectionsmeeting in the vertical plane of the crank shaft, each section havingintegral therewith a crank case section and integral half crank shaftbearing supports, a plurality of 50 crank shaft bearing insertsnon-rotatively engaging said half bearing supports and bridging themeeting plane therebetween, said inserts cooperating to align said halfbearing supports of each section with each other and. with the axis ofthe 5 crank shaft, and means for clamping said aligned sections to eachother.

2. A multi-cylinder V-type engine comprising two separate sectionsmeeting in the vertical plane of the crank shaft, each section havingintegral therewith a crank case section and integral half crank shaftbearing supports, a crank shaft, split bearing bushings engaging saidcrank shaft and said half bearing supports arranged with their plane ofdivision transverse to the plane of division between said sections,means for holding said bushings from rotation in said supports and meansfor clamping said sections to each other. 3. A multi-cylinder V-typeengine comprising two separate sections meeting in the vertical plane ofthe crank shaft, each section having integral therewith a crank casesection and integral half crank shaft bearing supports, a crank shaft,split bearing bushings engaging said crank shaft and said half bearingsupports arranged with their plane of division transverse to the planeof division between said sections, means for holding said bushings fromrotation in said supports and means for clamping said sections to 10each other, including clamping means for thei complementary portions ofsaid bearing supports.

- 1 ALANSON P. BRUSH.

